PMID: 3755798Aug 1, 1986Paper

Cytotoxicity, DNA fragmentation and sister-chromatid exchange in Chinese hamster ovary cells exposed to the lipid peroxidation product 4-hydroxynonenal and homologous aldehydes

Mutation Research
G BrambillaH Esterbauer

Abstract

The cytotoxic and genotoxic activities of 4-hydroxypentenal (HPE), 4-hydroxyhexenal (HHE), 4-hydroxyoctenal (HOE), 4-hydroxynonenal (HNE) and 4-hydroxyundecenal (HUE) were investigated in Chinese hamster ovary (CHO) cells. All five 4-hydroxyalkenals reduced plating efficiency in a concentration (ranging from 7 to 170 microM) lower than that producing a parallel reduction of trypan blue-excluding cells, but with both methods the increase in molarity needed to obtain a lethal effect was constantly rather small. With all five 4-hydroxyalkenals a significant amount of DNA fragmentation, as revealed either by the alkaline elution assay or by alkaline denaturation followed by chromatographic partition of single- and double-stranded DNA, was detected only after cell exposure to a cytotoxic concentration. HPE, HHE and HOE induced a clear-cut increase of sister-chromatid exchange (SCE) frequency, while that displayed by cells treated with HNE and HUE was minimal, even if dose-dependent and statistically significant. Since 4-hydroxyalkenals have been shown to originate from biomembrane lipids peroxidation, these findings should be taken into consideration in the assessment of the genotoxic role of lipoperoxidation in humans.

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Citations

Jul 16, 1990·Biochimica Et Biophysica Acta·H HammadY Sakamoto
Sep 1, 1989·Mutation Research·I Emerit, M Lahoud-Maghani
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